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NAME
tell − Return current access position for an open channel
SYNOPSIS
tell channelId _________________________________________________________________
DESCRIPTION
Returns an integer string giving the current access position in │ channelId. This value returned is a byte offset that can be passed to │ seek in order to set the channel to a particular position. Note that │ this value is in terms of bytes, not characters like read. The value returned is -1 for channels that do not support seeking.
ChannelId must be an identifier for an open channel such as a Tcl │ standard channel (stdin, stdout, or stderr), the return value from an │ invocation of open or socket, or the result of a channel creation │ command provided by a Tcl extension.
SEE ALSO
file(n), open(n), close(n), gets(n), seek(n), Tcl_StandardChannels(3)
KEYWORDS
access position, channel, seeking